Engine 69 351w Blower Motor

B&M did a blower for the SBF but it required adapter plates to fit the 351W. good little 8-10psi blower. What cylinder heads do you have. As far as the shortblock, it would be good to have another competent machine shop double check the work done by the now out of business shop, just to be sure that you are not throwing good money after bad.

check this site out. these are 6-71 blower kits, but since you are not going racing in a class where you need an 8-71, these are the way to go;

Supercharger USA - 289 302 351C 351W 400M 429 460 429 Boss Ford Blower Supercharger Kits for 671 871 1071 1471 Blowers - Superchargers

If I were in your situation I would want to know what compression the engine is set up for. Then I would also need to know when the intake valve closes and I would calculate dynamic compression. Then I would determine whether the dynamic compression is good for the fuel I plan to run. Also, if it were me I would want to know exactly what rods, crank and pistons are in the engine. Some pistons are built to withstand boost and others are not. I'm not sure whether you want an 8-71 or 6-71 - the 8-71 will make more boost and you might need that big of a blower to get the 8-10 lbs you are currently looking for. I would recommend discussing with the manufacturer of the blower. I think you should make sure you know all the details of the build before calling because they will want details in order to give you the correct advice. Make sure you have a strong crank that will handle the load from turning the blower pulley.

Maybe you know all this and have it all worked out, but the tone of your post seems like you are unsure.

The rest of my advice would be all around making sure the structure of your car is stiff enough to withstand the power you are going to make. You didn't say what car you're putting it in, but a blown 427 small block will put a hurting on just about any Ford unibody structure. You will want the doors to continue fitting the body and closing properly! Don't forget the drivetrain and suspension, either!

Good luck!